Radiation imagery chemistry: process – composition – or product th – Post imaging processing – Physical developing
Patent
1985-02-27
1989-01-24
Arnold, Bruce Y.
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
Physical developing
350320, 430 1, 430 2, G03H 102
Patent
active
047997460
ABSTRACT:
Light sensitive recording medium is exposed to highly absorbed incoherent light either before or after a slant fringe hologram is recorded therein to reduce the sensitivity of the medium at surface regions adjacent a supporting substrate. The fringes recorded in the area of reduced sensitivity have lower contrast than those recorded in the remainder of the medium, freeing the fringes from the substrate and allowing greater expansion of the medium during a subsequent chemical swelling process. The increased swelling amplifies the refractive index modulation in the medium to increase the diffraction efficiency of the hologram. Dye may be added to the medium to increase absorbance of the incoherent light.
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Alkov Leonard A.
Arnold Bruce Y.
Hughes Aircraft Company
Karambelas A. W.
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